Flip up compartment floor

Abstract

A shelf includes a floor plate, a cam plate, and a first pin joint plate. The cam plate extends away from an upper surface of the floor plate. A top edge of the cam plate is opposite a bottom edge of the cam plate that is mounted to the upper surface and has a concave shape that curves inward toward the upper surface. The first pin joint plate is mounted to the floor plate to extend away from a lower surface of the floor plate. The first pin joint plate is configured to mate with a second pin joint plate mounted to a first wall. The top edge of the cam plate is positioned to abut a tab mounted to the second wall when the floor plate is rotated toward the second wall. The upper surface faces the second wall when the floor plate is rotated toward the second wall.

What is claimed is: 
     
       1. A shelf comprising:
 a floor plate comprising a front edge, a right edge, a left edge, and a back edge, wherein the back edge is closest to a second wall when the floor plate is mounted adjacent the second wall, wherein the right edge extends between the front edge and the back edge, wherein the left edge extends between the front edge and the back edge; 
 a cam plate mounted to the floor plate to extend away from an upper surface of the floor plate, wherein a top edge of the cam plate is opposite a bottom edge of the cam plate that is mounted to the upper surface of the floor plate, wherein the top edge has a concave shape that curves inward toward the upper surface of the floor plate; and 
 a first pin joint plate mounted to the floor plate to extend away from a lower surface of the floor plate, wherein the first pin joint plate is configured to mate with a second pin joint plate mounted to a first wall when the floor plate is mounted to the first wall, 
 wherein the top edge of the cam plate is positioned to abut a tab mounted to the second wall when the floor plate is mounted adjacent the second wall and rotated toward the second wall, wherein the upper surface of the floor plate faces the second wall when the floor plate is rotated toward the second wall. 
 
     
     
       2. The shelf of  claim 1 , wherein the cam plate is mounted to the floor plate adjacent the back edge of the floor plate. 
     
     
       3. The shelf of  claim 1 , further comprising:
 a second cam plate mounted to the floor plate to extend away from the upper surface of the floor plate, wherein a top edge of the second cam plate is opposite a bottom edge of the second cam plate that is mounted to the upper surface of the floor plate, wherein the top edge of the second cam plate has the concave shape that curves inward toward the upper surface of the floor plate. 
 
     
     
       4. The shelf of  claim 3 , wherein the cam plate is mounted to the floor plate adjacent a right corner defined where the right edge meets the back edge of the floor plate, and the second cam plate is mounted to the floor plate adjacent a left corner defined where the left edge meets the back edge of the floor plate. 
     
     
       5. The shelf of  claim 3 , wherein the top edge of the second cam plate is positioned to abut a second tab mounted to the second wall when the floor plate is mounted adjacent the second wall and rotated toward the second wall. 
     
     
       6. The shelf of  claim 1 , wherein the cam plate comprises a notch formed in the top edge of the cam plate, wherein the tab engages with the notch when the floor plate is rotated to extend in a direction that is approximately parallel to the second wall. 
     
     
       7. The shelf of  claim 6 , wherein the top edge of the cam plate is elongated to extend from the back edge of the floor plate to the front edge of the floor plate. 
     
     
       8. The shelf of  claim 7 , wherein the notch is formed in a front half of the top edge of the cam plate, wherein, relative to a center of the elongated top edge, the front half of the top edge is on a side of the center toward the front edge of the floor plate. 
     
     
       9. The shelf of  claim 1 , further comprising a handle mounted to the lower surface of the floor plate to extend away from the lower surface of the floor plate, wherein the handle is positioned closer to the front edge of the floor plate than the back edge of the floor plate. 
     
     
       10. The shelf of  claim 1 , wherein the cam plate is at least partially above the first pin joint plate when the floor plate is in a horizontal position. 
     
     
       11. The shelf of  claim 10 , wherein the cam plate is centered above the first pin joint plate in a direction from the front edge of the floor plate to the back edge of the floor plate. 
     
     
       12. The shelf of  claim 1 , further comprising:
 the first wall; and 
 the second wall is a back wall of the shelf, wherein the second wall is approximately perpendicular to the first wall. 
 
     
     
       13. The shelf of  claim 12 , wherein the tab is formed by two apertures formed through the second wall along a lower edge of the second wall. 
     
     
       14. The shelf of  claim 12 , wherein the first wall is a bottom wall that extends parallel to the floor plate when the floor plate is in a horizontal position, wherein the second pin joint plate is mounted to the first wall to extend away from an upper surface of the first wall. 
     
     
       15. The shelf of  claim 14 , wherein the first pin joint plate includes a pin that protrudes approximately perpendicularly from the first pin joint plate, wherein the second pin joint plate includes an aperture formed at least partially through the second pin joint plate, wherein the pin is mounted within the aperture when the floor plate is mounted to the first wall. 
     
     
       16. The shelf of  claim 14 , wherein, when the floor plate is mounted to the first wall, the first wall includes a shelf that extends away from a side edge of the first wall toward the floor plate, and a portion of the lower surface of the floor plate rests on the shelf. 
     
     
       17. The shelf of  claim 12 , further comprising:
 a top wall mounted to the second wall to extend over the floor plate and the first wall. 
 
     
     
       18. The shelf of  claim 17 , further comprising:
 a right side wall mounted adjacent a right end of the top wall and the second wall; 
 a left side wall mounted adjacent a left end of the top wall and the second wall; and 
 a shelf door mounted between the right side wall and the left side wall, 
 wherein the shelf door is configured to open. 
 
     
     
       19. A door comprising:
 an interior door plate; 
 a right mounting ladder mounted to the interior door plate; 
 a left mounting ladder mounted to the interior door plate; 
 a shelf mounted to the right mounting ladder and to the left mounting ladder; and 
 a rotatable shelf mounted to the right mounting ladder and to the left mounting ladder above the shelf, the rotatable shelf comprising
 a floor plate comprising a front edge, a right edge, a left edge, and a back edge, wherein the back edge is closest to a second wall when the floor plate is mounted adjacent the second wall, wherein the right edge extends between the front edge and the back edge, wherein the left edge extends between the front edge and the back edge; 
 a cam plate mounted to the floor plate to extend away from an upper surface of the floor plate, wherein a top edge of the cam plate is opposite a bottom edge of the cam plate that is mounted to the upper surface of the floor plate, wherein the top edge has a concave shape that curves inward toward the upper surface of the floor plate; and 
 a first pin joint plate mounted to the floor plate to extend away from a lower surface of the floor plate, wherein the first pin joint plate is configured to mate with a second pin joint plate mounted to a first wall when the floor plate is mounted to the first wall, 
 wherein the top edge of the cam plate is positioned to abut a tab mounted to the second wall when the floor plate is mounted adjacent the second wall and rotated toward the second wall, wherein the upper surface of the floor plate faces the second wall when the floor plate is rotated toward the second wall. 
 
 
     
     
       20. A refrigerator comprising:
 a refrigeration system; 
 a compartment comprising
 a plurality of walls; and 
 a door configured to provide access to an enclosed space defined by the plurality of walls and the door; 
 
 a right mounting ladder mounted to the door; 
 a left mounting ladder mounted to the door; 
 a shelf mounted to the right mounting ladder and to the left mounting ladder; and 
 a rotatable shelf mounted to the right mounting ladder and to the left mounting ladder above the shelf, the rotatable shelf comprising
 a floor plate comprising a front edge, a right edge, a left edge, and a back edge, wherein the back edge is closest to a second wall when the floor plate is mounted adjacent the second wall, wherein the right edge extends between the front edge and the back edge, wherein the left edge extends between the front edge and the back edge; 
 a cam plate mounted to the floor plate to extend away from an upper surface of the floor plate, wherein a top edge of the cam plate is opposite a bottom edge of the cam plate that is mounted to the upper surface of the floor plate, wherein the top edge has a concave shape that curves inward toward the upper surface of the floor plate; and 
 a first pin joint plate mounted to the floor plate to extend away from a lower surface of the floor plate, wherein the first pin joint plate is configured to mate with a second pin joint plate mounted to a first wall when the floor plate is mounted to the first wall, 
 wherein the top edge of the cam plate is positioned to abut a tab mounted to the second wall when the floor plate is mounted adjacent the second wall and rotated toward the second wall, wherein the upper surface of the floor plate faces the second wall when the floor plate is rotated toward the second wall.